Question

If $$ A = \begin{pmatrix} 2 & 3 \\ 1 & k \end{pmatrix} $$ and $\det(A) = 7$, find the value of $ k $.

• A. \(1\)
• B. \(2\)
• C. \(5\)
• D. \(4\)

Hint:

Tip: Carefully apply determinant formula and check arithmetic to avoid mistakes.